<template>
  <div class="article-page">
    <nav class="my-nav van-hairline--bottom">
      <a href="javascript:;" :class="{active:sorter==='weight_desc'}"
      @click="getArticleLst('weight_desc')">推荐</a>
      <a href="javascript:;"
      :class="{active:sorter===null}"
       @click="getArticleLst(null)"  >最新</a>
      <div class="logo"><img src="@/assets/logo.png" alt="" /></div>
    </nav>
    <van-list
      v-model="loading"
      :finished="finished"
      finished-text="没有更多了"
      @load="onLoad"
    >
      <ArtItem v-for="item in list" :key="item.id" :item="item"></ArtItem>
    </van-list>
  </div>

</template>
<script>
import { reqGetList } from '@/api/article'
export default {
  name: 'article-page',
  data () {
    return {
      list: [], // 文章列表
      loading: false, // 控制加载状态
      finished: false, // 控制加载结束
      current: 1,
      pageSize: 30,
      sorter: 'weight_desc',
      pageTotal: 0
    }
  },
  // created () {
  //   this.onLoad()
  // },
  methods: {
    // 获取文章列表
    async onLoad () {
      const res = await reqGetList(this.current, this.pageSize, this.sorter)
      // console.log(res)
      this.list.push(...res.data.rows)
      this.pageTotal = res.data.pageTotal
      // 手动设置loading为false
      this.loading = false
      // 让current自增  请求后续页面的数据
      this.current++
      if (this.current > this.pageTotal) {
        this.finished = true
      }
    },
    getArticleLst (str) {
      this.sorter = str
      this.list = []// 盛放最新的数据
      this.current = 1// 从第一页开始
      this.finished = false
      // 手动触发loading事件，直接发请求避免了再次调用onload
      this.loading = true
      this.onLoad()
    }
  }
}
</script>
<style lang="less" scoped>
.article-page {
  margin-bottom: 50px;
  margin-top: 44px;
  .my-nav {
    height: 44px;
    position: fixed;
    left: 0;
    top: 0;
    width: 100%;
    z-index: 999;
    background: #fff;
    display: flex;
    align-items: center;
    > a {
      color: #999;
      font-size: 14px;
      line-height: 44px;
      margin-left: 20px;
      position: relative;
      transition: all 0.3s;
      &::after {
        content: "";
        position: absolute;
        left: 50%;
        transform: translateX(-50%);
        bottom: 0;
        width: 0;
        height: 2px;
        background: #222;
        transition: all 0.3s;
      }
      &.active {
        color: #222;
        &::after {
          width: 14px;
        }
      }
    }
    .logo {
      flex: 1;
      display: flex;
      justify-content: flex-end;
      > img {
        width: 64px;
        height: 28px;
        display: block;
        margin-right: 10px;
      }
    }
  }
}
</style>
